Malicious PDF — malware analysis report

Static analysis result for SHA-256 17eeff2d2990c1dd…

MALICIOUS

PDF

76.6 KB Created: 2021-06-19 02:50:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0662ca07ccb4e845c852231df134f615 SHA-1: 39e67572778128c535d7263d5fbaa21b9f384b63 SHA-256: 17eeff2d2990c1ddad838e57e45ec8ef6b6da23a2ac89efef2acb9213b3917da
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://blugarden.eu/file/55486572392.pdf In PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/c1f1f50ce9c26aa236eaa634292b8bb9/10682062745.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd9c54f745---98593635630.pdfIn PDF document text
    • https://loyallcanada.ca/editor_files/file/15355763254.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/h5gq6u05ng7kkkochr2no8p618/wamulanofuzuxugot.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/ee3e978177c84b5600d42a0c52908bad/14648066045.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160713efdeb904---kozavuxejisegadid.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089158b167f0---kepoja.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/a40bfe36886fa7764ad8f71d26ea3eb0/gifivijulew.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/50f39f3e87c88de84c2cbb3737bd1cdc/biwawokubexiref.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160905a4022e5c---leperovulogodun.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file/%5C/6742572731.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/0eb151e78b8d52e8095615450046bb98/solinebuwurowaresa.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/18817698134.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608569f0d5de2---togosedokafumesugufeb.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160ac49134d9f3---zogekuv.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16095be5531f5b---tiwekeropafidokawe.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=sao+war+of+underworld+episode+17PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000dfc5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDFC5 11148 bytes
SHA-256: c1cd039a900c2288fe26b329c35e14e59d7c0aaddbd7a72684c0a4002d40918b
font_00_sfnt_off0000cd65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD65 5364 bytes
SHA-256: 77e0abe97af8669af5685d820aa9e318b0a8b7e49f4d57cf6dcb58398a47ed12
font_02_sfnt_off0000ff10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF10 10868 bytes
SHA-256: b3d1d9afa9f1d80c0d6bfac2e93631673782d8ce11d4b040b1e4952f44f0f4e8

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